Bus



FIG. 1 is an enlarged front left perspective view of a bus showing our new design;

FIG. 2 is an enlarged rear right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines shown in the drawings illustrate portions of the bus that form no part of the claimed design. 

CLAIM The ornamental design for a bus, as shown and described. 